Basic Alembic support

All in all, this patch adds an Alembic importer, an Alembic exporter,
and a new CacheFile data block which, for now, wraps around an Alembic
archive. This data block is made available through a new modifier ("Mesh
Sequence Cache") as well as a new constraint ("Transform Cache") to
somewhat properly support respectively geometric and transformation data
streaming from alembic caches.

A more in-depth documentation is to be found on the wiki, as well as a
 guide to compile alembic: https://wiki.blender.org/index.php/
User:Kevindietrich/AlembicBasicIo.

Many thanks to everyone involved in this little project, and huge shout
out to "cgstrive" for the thorough testings with Maya, 3ds Max, Houdini
and Realflow as well as @fjuhec, @jensverwiebe and @jasperge for the
custom builds and compile fixes.

Reviewers: sergey, campbellbarton, mont29

Reviewed By: sergey, campbellbarton, mont29

Differential Revision: https://developer.blender.org/D2060

12 files changed, 397 insertions, 1 deletions

diff --git a/source/blender/makesrna/intern/CMakeLists.txt b/source/blender/makesrna/intern/CMakeLists.txt
index 7bfac9d0605..44e99bd2995 100644
--- a/source/blender/makesrna/intern/CMakeLists.txt
+++ b/source/blender/makesrna/intern/CMakeLists.txt
@@ -38,6 +38,7 @@ set(DEFSRC
 	rna_armature.c
 	rna_boid.c
 	rna_brush.c
+	rna_cachefile.c
 	rna_camera.c
 	rna_cloth.c
 	rna_color.c
@@ -290,6 +291,13 @@ if(WITH_INTERNATIONAL)
 	add_definitions(-DWITH_INTERNATIONAL)
 endif()
 
+if(WITH_ALEMBIC)
+	list(APPEND INC
+		../../alembic
+	)
+	add_definitions(-DWITH_ALEMBIC)
+endif()
+
 if(WITH_BULLET)
 	list(APPEND INC
 		../../../../intern/rigidbody
diff --git a/source/blender/makesrna/intern/makesrna.c b/source/blender/makesrna/intern/makesrna.c
index f9a46409aea..1f8ef0dbab5 100644
--- a/source/blender/makesrna/intern/makesrna.c
+++ b/source/blender/makesrna/intern/makesrna.c
@@ -3301,6 +3301,7 @@ static RNAProcessItem PROCESS_ITEMS[] = {
 	{"rna_armature.c", "rna_armature_api.c", RNA_def_armature},
 	{"rna_boid.c", NULL, RNA_def_boid},
 	{"rna_brush.c", NULL, RNA_def_brush},
+	{"rna_cachefile.c", NULL, RNA_def_cachefile},
 	{"rna_camera.c", "rna_camera_api.c", RNA_def_camera},
 	{"rna_cloth.c", NULL, RNA_def_cloth},
 	{"rna_color.c", NULL, RNA_def_color},
diff --git a/source/blender/makesrna/intern/rna_ID.c b/source/blender/makesrna/intern/rna_ID.c
index 8ad6713192a..fdb93ac1a18 100644
--- a/source/blender/makesrna/intern/rna_ID.c
+++ b/source/blender/makesrna/intern/rna_ID.c
@@ -52,6 +52,7 @@ EnumPropertyItem rna_enum_id_type_items[] = {
 	{ID_AR, "ARMATURE", ICON_ARMATURE_DATA, "Armature", ""},
 	{ID_BR, "BRUSH", ICON_BRUSH_DATA, "Brush", ""},
 	{ID_CA, "CAMERA", ICON_CAMERA_DATA, "Camera", ""},
+	{ID_CF, "CACHEFILE", ICON_FILE, "Cache File", ""},
 	{ID_CU, "CURVE", ICON_CURVE_DATA, "Curve", ""},
 	{ID_VF, "FONT", ICON_FONT_DATA, "Font", ""},
 	{ID_GD, "GREASEPENCIL", ICON_GREASEPENCIL, "Grease Pencil", ""},
@@ -139,6 +140,7 @@ short RNA_type_to_ID_code(StructRNA *type)
 	if (RNA_struct_is_a(type, &RNA_Action)) return ID_AC;
 	if (RNA_struct_is_a(type, &RNA_Armature)) return ID_AR;
 	if (RNA_struct_is_a(type, &RNA_Brush)) return ID_BR;
+	if (RNA_struct_is_a(type, &RNA_CacheFile)) return ID_CF;
 	if (RNA_struct_is_a(type, &RNA_Camera)) return ID_CA;
 	if (RNA_struct_is_a(type, &RNA_Curve)) return ID_CU;
 	if (RNA_struct_is_a(type, &RNA_GreasePencil)) return ID_GD;
@@ -179,6 +181,7 @@ StructRNA *ID_code_to_RNA_type(short idcode)
 		case ID_AR: return &RNA_Armature;
 		case ID_BR: return &RNA_Brush;
 		case ID_CA: return &RNA_Camera;
+		case ID_CF: return &RNA_CacheFile;
 		case ID_CU: return &RNA_Curve;
 		case ID_GD: return &RNA_GreasePencil;
 		case ID_GR: return &RNA_Group;
diff --git a/source/blender/makesrna/intern/rna_cachefile.c b/source/blender/makesrna/intern/rna_cachefile.c
new file mode 100644
index 00000000000..7249ebd5feb
--- /dev/null
+++ b/source/blender/makesrna/intern/rna_cachefile.c
@@ -0,0 +1,169 @@
+/*
+ * ***** BEGIN GPL LICENSE BLOCK *****
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ * The Original Code is Copyright (C) 2016 Blender Foundation.
+ * All rights reserved.
+ *
+ * Contributor(s): Kevin Dietrich.
+ *
+ * ***** END GPL LICENSE BLOCK *****
+ */
+
+#include "DNA_cachefile_types.h"
+#include "DNA_scene_types.h"
+
+#include "RNA_access.h"
+#include "RNA_define.h"
+#include "RNA_enum_types.h"
+
+#include "rna_internal.h"
+
+#ifdef RNA_RUNTIME
+
+#include "BKE_cachefile.h"
+#include "BKE_depsgraph.h"
+
+#include "DEG_depsgraph.h"
+
+#include "WM_api.h"
+#include "WM_types.h"
+
+#ifdef WITH_ALEMBIC
+#  include "../../../alembic/ABC_alembic.h"
+#endif
+
+static void rna_CacheFile_update(Main *bmain, Scene *scene, PointerRNA *ptr)
+{
+	CacheFile *cache_file = (CacheFile *)ptr->data;
+
+	DAG_id_tag_update(&cache_file->id, 0);
+	WM_main_add_notifier(NC_OBJECT | ND_DRAW, NULL);
+
+	UNUSED_VARS(bmain, scene);
+}
+
+static void rna_CacheFile_update_handle(Main *bmain, Scene *scene, PointerRNA *ptr)
+{
+	CacheFile *cache_file = ptr->data;
+
+	BKE_cachefile_reload(bmain, cache_file);
+
+	rna_CacheFile_update(bmain, scene, ptr);
+}
+
+static void rna_CacheFile_object_paths_begin(CollectionPropertyIterator *iter, PointerRNA *ptr)
+{
+	CacheFile *cache_file = (CacheFile *)ptr->data;
+	rna_iterator_listbase_begin(iter, &cache_file->object_paths, NULL);
+}
+
+#else
+
+/* cachefile.object_paths */
+static void rna_def_alembic_object_path(BlenderRNA *brna)
+{
+	StructRNA *srna = RNA_def_struct(brna, "AlembicObjectPath", NULL);
+	RNA_def_struct_sdna(srna, "AlembicObjectPath");
+	RNA_def_struct_ui_text(srna, "Object Path", "Path of an object inside of an Alembic archive");
+	RNA_def_struct_ui_icon(srna, ICON_NONE);
+
+	PropertyRNA *prop = RNA_def_property(srna, "path", PROP_STRING, PROP_NONE);
+	RNA_def_property_ui_text(prop, "Path", "Object path");
+	RNA_def_struct_name_property(srna, prop);
+}
+
+/* cachefile.object_paths */
+static void rna_def_cachefile_object_paths(BlenderRNA *brna, PropertyRNA *cprop)
+{
+	RNA_def_property_srna(cprop, "AlembicObjectPaths");
+	StructRNA *srna = RNA_def_struct(brna, "AlembicObjectPaths", NULL);
+	RNA_def_struct_sdna(srna, "CacheFile");
+	RNA_def_struct_ui_text(srna, "Object Paths", "Collection of object paths");
+}
+
+static void rna_def_cachefile(BlenderRNA *brna)
+{
+	StructRNA *srna = RNA_def_struct(brna, "CacheFile", "ID");
+	RNA_def_struct_sdna(srna, "CacheFile");
+	RNA_def_struct_ui_text(srna, "CacheFile", "");
+	RNA_def_struct_ui_icon(srna, ICON_FILE);
+
+	PropertyRNA *prop = RNA_def_property(srna, "filepath", PROP_STRING, PROP_FILEPATH);
+	RNA_def_property_ui_text(prop, "File Path", "Path to external displacements file");
+	RNA_def_property_update(prop, 0, "rna_CacheFile_update_handle");
+
+	prop = RNA_def_property(srna, "is_sequence", PROP_BOOLEAN, PROP_NONE);
+	RNA_def_property_ui_text(prop, "Sequence", "Whether the cache is separated in a series of files");
+	RNA_def_property_update(prop, 0, "rna_CacheFile_update");
+
+	/* ----------------- For Scene time ------------------- */
+
+	prop = RNA_def_property(srna, "override_frame", PROP_BOOLEAN, PROP_NONE);
+	RNA_def_property_ui_text(prop, "Override Frame",
+	                         "Whether to use a custom frame for looking up data in the cache file,"
+	                         " instead of using the current scene frame");
+	RNA_def_property_update(prop, 0, "rna_CacheFile_update");
+
+	prop = RNA_def_property(srna, "frame", PROP_FLOAT, PROP_NONE);
+	RNA_def_property_float_sdna(prop, NULL, "frame");
+	RNA_def_property_range(prop, -MAXFRAME, MAXFRAME);
+	RNA_def_property_ui_text(prop, "Frame", "The time to use for looking up the data in the cache file,"
+	                                        " or to determine which file to use in a file sequence");
+	RNA_def_property_update(prop, 0, "rna_CacheFile_update");
+
+	/* ----------------- Axis Conversion ----------------- */
+
+	prop = RNA_def_property(srna, "forward_axis", PROP_ENUM, PROP_NONE);
+	RNA_def_property_enum_sdna(prop, NULL, "forward_axis");
+	RNA_def_property_enum_items(prop, rna_enum_object_axis_items);
+	RNA_def_property_ui_text(prop, "Forward", "");
+	RNA_def_property_update(prop, 0, "rna_CacheFile_update");
+
+	prop = RNA_def_property(srna, "up_axis", PROP_ENUM, PROP_NONE);
+	RNA_def_property_enum_sdna(prop, NULL, "up_axis");
+	RNA_def_property_enum_items(prop, rna_enum_object_axis_items);
+	RNA_def_property_ui_text(prop, "Up", "");
+	RNA_def_property_update(prop, 0, "rna_CacheFile_update");
+
+	prop = RNA_def_property(srna, "scale", PROP_FLOAT, PROP_NONE);
+	RNA_def_property_float_sdna(prop, NULL, "scale");
+	RNA_def_property_range(prop, 0.0001f, 1000.0f);
+	RNA_def_property_ui_text(prop, "Scale", "Value by which to enlarge or shrink the object with respect to the world's origin"
+	                                        " (only applicable through a Transform Cache constraint)");
+	RNA_def_property_update(prop, 0, "rna_CacheFile_update");
+
+	/* object paths */
+	prop = RNA_def_property(srna, "object_paths", PROP_COLLECTION, PROP_NONE);
+	RNA_def_property_collection_sdna(prop, NULL, "object_paths", NULL);
+	RNA_def_property_collection_funcs(prop, "rna_CacheFile_object_paths_begin", "rna_iterator_listbase_next",
+	                                  "rna_iterator_listbase_end", "rna_iterator_listbase_get",
+	                                  NULL, NULL, NULL, NULL);
+	RNA_def_property_struct_type(prop, "AlembicObjectPath");
+	RNA_def_property_srna(prop, "AlembicObjectPaths");
+	RNA_def_property_ui_text(prop, "Object Paths", "Paths of the objects inside the Alembic archive");
+	rna_def_cachefile_object_paths(brna, prop);
+
+	rna_def_animdata_common(srna);
+}
+
+void RNA_def_cachefile(BlenderRNA *brna)
+{
+	rna_def_cachefile(brna);
+	rna_def_alembic_object_path(brna);
+}
+
+#endif
diff --git a/source/blender/makesrna/intern/rna_constraint.c b/source/blender/makesrna/intern/rna_constraint.c
index 98560bf3452..db3f76f3cfc 100644
--- a/source/blender/makesrna/intern/rna_constraint.c
+++ b/source/blender/makesrna/intern/rna_constraint.c
@@ -72,6 +72,8 @@ EnumPropertyItem rna_enum_constraint_type_items[] = {
 	                            "Compensate for scaling one axis by applying suitable scaling to the other two axes"},
 	{CONSTRAINT_TYPE_TRANSFORM, "TRANSFORM", ICON_CONSTRAINT_DATA, "Transformation", 
 	                            "Use one transform property from target to control another (or same) property on owner"},
+	{CONSTRAINT_TYPE_TRANSFORM_CACHE, "TRANSFORM_CACHE", ICON_CONSTRAINT_DATA, "Transform Cache",
+	                            "Look up the transformation matrix from an external file"},
 	{0, "", 0, N_("Tracking"), ""},
 	{CONSTRAINT_TYPE_CLAMPTO,   "CLAMP_TO", ICON_CONSTRAINT_DATA, "Clamp To", 
 	                            "Restrict movements to lie along a curve by remapping location along curve's longest axis"},
@@ -214,6 +216,8 @@ static StructRNA *rna_ConstraintType_refine(struct PointerRNA *ptr)
 			return &RNA_CameraSolverConstraint;
 		case CONSTRAINT_TYPE_OBJECTSOLVER:
 			return &RNA_ObjectSolverConstraint;
+		case CONSTRAINT_TYPE_TRANSFORM_CACHE:
+			return &RNA_TransformCacheConstraint;
 		default:
 			return &RNA_UnknownType;
 	}
@@ -2571,6 +2575,27 @@ static void rna_def_constraint_object_solver(BlenderRNA *brna)
 	                               "rna_Constraint_cameraObject_poll");
 }
 
+static void rna_def_constraint_transform_cache(BlenderRNA *brna)
+{
+	StructRNA *srna;
+	PropertyRNA *prop;
+
+	srna = RNA_def_struct(brna, "TransformCacheConstraint", "Constraint");
+	RNA_def_struct_ui_text(srna, "Transform Cache Constraint", "Look up transformation from an external file");
+	RNA_def_struct_sdna_from(srna, "bTransformCacheConstraint", "data");
+
+	prop = RNA_def_property(srna, "cache_file", PROP_POINTER, PROP_NONE);
+	RNA_def_property_pointer_sdna(prop, NULL, "cache_file");
+	RNA_def_property_struct_type(prop, "CacheFile");
+	RNA_def_property_ui_text(prop, "Cache File", "");
+	RNA_def_property_flag(prop, PROP_EDITABLE | PROP_ID_SELF_CHECK);
+	RNA_def_property_update(prop, 0, "rna_Constraint_dependency_update");
+
+	prop = RNA_def_property(srna, "object_path", PROP_STRING, PROP_NONE);
+	RNA_def_property_ui_text(prop, "Object Path", "Path to the object in the Alembic archive used to lookup the transform matrix");
+	RNA_def_property_update(prop, 0, "rna_Constraint_update");
+}
+
 /* base struct for constraints */
 void RNA_def_constraint(BlenderRNA *brna)
 {
@@ -2687,6 +2712,7 @@ void RNA_def_constraint(BlenderRNA *brna)
 	rna_def_constraint_follow_track(brna);
 	rna_def_constraint_camera_solver(brna);
 	rna_def_constraint_object_solver(brna);
+	rna_def_constraint_transform_cache(brna);
 }
 
 #endif
diff --git a/source/blender/makesrna/intern/rna_internal.h b/source/blender/makesrna/intern/rna_internal.h
index 161e19f581c..364aa9ba939 100644
--- a/source/blender/makesrna/intern/rna_internal.h
+++ b/source/blender/makesrna/intern/rna_internal.h
@@ -133,6 +133,7 @@ void RNA_def_armature(struct BlenderRNA *brna);
 void RNA_def_actuator(struct BlenderRNA *brna);
 void RNA_def_boid(struct BlenderRNA *brna);
 void RNA_def_brush(struct BlenderRNA *brna);
+void RNA_def_cachefile(struct BlenderRNA *brna);
 void RNA_def_camera(struct BlenderRNA *brna);
 void RNA_def_cloth(struct BlenderRNA *brna);
 void RNA_def_color(struct BlenderRNA *brna);
@@ -332,6 +333,7 @@ void RNA_def_main_gpencil(BlenderRNA *brna, PropertyRNA *cprop);
 void RNA_def_main_movieclips(BlenderRNA *brna, PropertyRNA *cprop);
 void RNA_def_main_masks(BlenderRNA *brna, PropertyRNA *cprop);
 void RNA_def_main_linestyles(BlenderRNA *brna, PropertyRNA *cprop);
+void RNA_def_main_cachefiles(BlenderRNA *brna, PropertyRNA *cprop);
 
 /* ID Properties */
 
diff --git a/source/blender/makesrna/intern/rna_main.c b/source/blender/makesrna/intern/rna_main.c
index e0538d1c05b..3392d0d9b3a 100644
--- a/source/blender/makesrna/intern/rna_main.c
+++ b/source/blender/makesrna/intern/rna_main.c
@@ -281,6 +281,12 @@ static void rna_Main_linestyle_begin(CollectionPropertyIterator *iter, PointerRN
 	rna_iterator_listbase_begin(iter, &bmain->linestyle, NULL);
 }
 
+static void rna_Main_cachefiles_begin(CollectionPropertyIterator *iter, PointerRNA *ptr)
+{
+	Main *bmain = (Main *)ptr->data;
+	rna_iterator_listbase_begin(iter, &bmain->cachefiles, NULL);
+}
+
 static void rna_Main_version_get(PointerRNA *ptr, int *value)
 {
 	Main *bmain = (Main *)ptr->data;
@@ -354,6 +360,7 @@ void RNA_def_main(BlenderRNA *brna)
 		{"movieclips", "MovieClip", "rna_Main_movieclips_begin", "Movie Clips", "Movie Clip datablocks", RNA_def_main_movieclips},
 		{"masks", "Mask", "rna_Main_masks_begin", "Masks", "Masks datablocks", RNA_def_main_masks},
 		{"linestyles", "FreestyleLineStyle", "rna_Main_linestyle_begin", "Line Styles", "Line Style datablocks", RNA_def_main_linestyles},
+		{"cache_files", "CacheFile", "rna_Main_cachefiles_begin", "Cache Files", "Cache Files datablocks", RNA_def_main_cachefiles},
 		{NULL, NULL, NULL, NULL, NULL, NULL}
 	};
 
diff --git a/source/blender/makesrna/intern/rna_main_api.c b/source/blender/makesrna/intern/rna_main_api.c
index 0b25a8b2a49..7c627e72fd5 100644
--- a/source/blender/makesrna/intern/rna_main_api.c
+++ b/source/blender/makesrna/intern/rna_main_api.c
@@ -535,6 +535,7 @@ RNA_MAIN_ID_TAG_FUNCS_DEF(gpencil, gpencil, ID_GD)
 RNA_MAIN_ID_TAG_FUNCS_DEF(movieclips, movieclip, ID_MC)
 RNA_MAIN_ID_TAG_FUNCS_DEF(masks, mask, ID_MSK)
 RNA_MAIN_ID_TAG_FUNCS_DEF(linestyle, linestyle, ID_LS)
+RNA_MAIN_ID_TAG_FUNCS_DEF(cachefiles, cachefiles, ID_CF)
 
 #undef RNA_MAIN_ID_TAG_FUNCS_DEF
 
@@ -1548,6 +1549,21 @@ void RNA_def_main_palettes(BlenderRNA *brna, PropertyRNA *cprop)
 	RNA_def_property_clear_flag(prop, PROP_EDITABLE);
 	RNA_def_property_boolean_funcs(prop, "rna_Main_palettes_is_updated_get", NULL);
 }
+void RNA_def_main_cachefiles(BlenderRNA *brna, PropertyRNA *cprop)
+{
+	RNA_def_property_srna(cprop, "BlendDataCacheFiles");
+	StructRNA *srna = RNA_def_struct(brna, "BlendDataCacheFiles", NULL);
+	RNA_def_struct_sdna(srna, "Main");
+	RNA_def_struct_ui_text(srna, "Main Cache Files", "Collection of cache files");
+
+	FunctionRNA *func = RNA_def_function(srna, "tag", "rna_Main_cachefiles_tag");
+	PropertyRNA *parm = RNA_def_boolean(func, "value", 0, "Value", "");
+	RNA_def_property_flag(parm, PROP_REQUIRED);
+
+	PropertyRNA *prop = RNA_def_property(srna, "is_updated", PROP_BOOLEAN, PROP_NONE);
+	RNA_def_property_clear_flag(prop, PROP_EDITABLE);
+	RNA_def_property_boolean_funcs(prop, "rna_Main_cachefiles_is_updated_get", NULL);
+}
 void RNA_def_main_gpencil(BlenderRNA *brna, PropertyRNA *cprop)
 {
 	StructRNA *srna;
diff --git a/source/blender/makesrna/intern/rna_modifier.c b/source/blender/makesrna/intern/rna_modifier.c
index a23ef6eaa82..0b55c19c374 100644
--- a/source/blender/makesrna/intern/rna_modifier.c
+++ b/source/blender/makesrna/intern/rna_modifier.c
@@ -30,6 +30,7 @@
 #include <stdlib.h>
 
 #include "DNA_armature_types.h"
+#include "DNA_cachefile_types.h"
 #include "DNA_mesh_types.h"
 #include "DNA_modifier_types.h"
 #include "DNA_object_types.h"
@@ -65,6 +66,7 @@ EnumPropertyItem rna_enum_object_modifier_type_items[] = {
 	{0, "", 0, N_("Modify"), ""},
 	{eModifierType_DataTransfer, "DATA_TRANSFER", ICON_MOD_DATA_TRANSFER, "Data Transfer", ""},
 	{eModifierType_MeshCache, "MESH_CACHE", ICON_MOD_MESHDEFORM, "Mesh Cache", ""},
+	{eModifierType_MeshSequenceCache, "MESH_SEQUENCE_CACHE", ICON_MOD_MESHDEFORM, "Mesh Sequence Cache", ""},
 	{eModifierType_NormalEdit, "NORMAL_EDIT", ICON_MOD_NORMALEDIT, "Normal Edit", ""},
 	{eModifierType_UVProject, "UV_PROJECT", ICON_MOD_UVPROJECT, "UV Project", ""},
 	{eModifierType_UVWarp, "UV_WARP", ICON_MOD_UVPROJECT, "UV Warp", ""},
@@ -281,6 +283,7 @@ EnumPropertyItem rna_enum_axis_flag_xyz_items[] = {
 #include "DNA_curve_types.h"
 #include "DNA_smoke_types.h"
 
+#include "BKE_cachefile.h"
 #include "BKE_context.h"
 #include "BKE_depsgraph.h"
 #include "BKE_library.h"
@@ -288,6 +291,10 @@ EnumPropertyItem rna_enum_axis_flag_xyz_items[] = {
 #include "BKE_object.h"
 #include "BKE_particle.h"
 
+#ifdef WITH_ALEMBIC
+#  include "ABC_alembic.h"
+#endif
+
 static void rna_UVProject_projectors_begin(CollectionPropertyIterator *iter, PointerRNA *ptr)
 {
 	UVProjectModifierData *uvp = (UVProjectModifierData *)ptr->data;
@@ -399,6 +406,8 @@ static StructRNA *rna_Modifier_refine(struct PointerRNA *ptr)
 			return &RNA_NormalEditModifier;
 		case eModifierType_CorrectiveSmooth:
 			return &RNA_CorrectiveSmoothModifier;
+		case eModifierType_MeshSequenceCache:
+			return &RNA_MeshSequenceCacheModifier;
 		/* Default */
 		case eModifierType_None:
 		case eModifierType_ShapeKey:
@@ -4216,6 +4225,42 @@ static void rna_def_modifier_meshcache(BlenderRNA *brna)
 	RNA_def_property_update(prop, 0, "rna_Modifier_update");
 }
 
+static void rna_def_modifier_meshseqcache(BlenderRNA *brna)
+{
+	StructRNA *srna;
+	PropertyRNA *prop;
+
+	srna = RNA_def_struct(brna, "MeshSequenceCacheModifier", "Modifier");
+	RNA_def_struct_ui_text(srna, "Cache Modifier", "Cache Mesh");
+	RNA_def_struct_sdna(srna, "MeshSeqCacheModifierData");
+	RNA_def_struct_ui_icon(srna, ICON_MOD_MESHDEFORM);  /* XXX, needs own icon */
+
+	prop = RNA_def_property(srna, "cache_file", PROP_POINTER, PROP_NONE);
+	RNA_def_property_pointer_sdna(prop, NULL, "cache_file");
+	RNA_def_property_struct_type(prop, "CacheFile");
+	RNA_def_property_ui_text(prop, "Cache File", "");
+	RNA_def_property_flag(prop, PROP_EDITABLE | PROP_ID_SELF_CHECK);
+	RNA_def_property_update(prop, 0, "rna_Modifier_dependency_update");
+
+	prop = RNA_def_property(srna, "object_path", PROP_STRING, PROP_NONE);
+	RNA_def_property_ui_text(prop, "Object Path", "Path to the object in the Alembic archive used to lookup geometric data");
+	RNA_def_property_update(prop, 0, "rna_Modifier_update");
+
+	static EnumPropertyItem read_flag_items[] = {
+		{MOD_MESHSEQ_READ_VERT,  "VERT", 0, "Vertex", ""},
+		{MOD_MESHSEQ_READ_POLY,  "POLY", 0, "Faces", ""},
+		{MOD_MESHSEQ_READ_UV,    "UV", 0, "UV", ""},
+		{MOD_MESHSEQ_READ_COLOR, "COLOR", 0, "Color", ""},
+		{0, NULL, 0, NULL, NULL}
+	};
+
+	prop = RNA_def_property(srna, "read_data", PROP_ENUM, PROP_NONE);
+	RNA_def_property_flag(prop, PROP_ENUM_FLAG);
+	RNA_def_property_enum_sdna(prop, NULL, "read_flag");
+	RNA_def_property_enum_items(prop, read_flag_items);
+	RNA_def_property_update(prop, 0, "rna_Modifier_update");
+}
+
 static void rna_def_modifier_laplaciandeform(BlenderRNA *brna)
 {
 	StructRNA *srna;
@@ -4745,6 +4790,7 @@ void RNA_def_modifier(BlenderRNA *brna)
 	rna_def_modifier_wireframe(brna);
 	rna_def_modifier_datatransfer(brna);
 	rna_def_modifier_normaledit(brna);
+	rna_def_modifier_meshseqcache(brna);
 }
 
 #endif
diff --git a/source/blender/makesrna/intern/rna_scene_api.c b/source/blender/makesrna/intern/rna_scene_api.c
index 1d3537dc9a0..ed51f0cffb0 100644
--- a/source/blender/makesrna/intern/rna_scene_api.c
+++ b/source/blender/makesrna/intern/rna_scene_api.c
@@ -37,6 +37,7 @@
 #include "BLI_path_util.h"
 
 #include "RNA_define.h"
+#include "RNA_enum_types.h"
 
 #include "DNA_anim_types.h"
 #include "DNA_object_types.h"
@@ -44,6 +45,18 @@
 
 #include "rna_internal.h"  /* own include */
 
+#ifdef WITH_ALEMBIC
+#  include "../../alembic/ABC_alembic.h"
+#endif
+
+EnumPropertyItem rna_enum_abc_compression_items[] = {
+#ifdef WITH_ALEMBIC
+	{ ABC_ARCHIVE_OGAWA, "OGAWA", 0, "Ogawa", "" },
+	{ ABC_ARCHIVE_HDF5, "HDF5", 0, "HDF5", "" },
+#endif
+	{ 0, NULL, 0, NULL, NULL }
+};
+
 #ifdef RNA_RUNTIME
 
 #include "BKE_animsys.h"
@@ -173,6 +186,73 @@ static void rna_Scene_ray_cast(
 	}
 }
 
+#ifdef WITH_ALEMBIC
+
+static void rna_Scene_alembic_export(
+        Scene *scene,
+        bContext *C,
+        const char *filepath,
+        int frame_start,
+        int frame_end,
+        int xform_samples,
+        int geom_samples,
+        float shutter_open,
+        float shutter_close,
+        int selected_only,
+        int uvs,
+        int normals,
+        int vcolors,
+        int apply_subdiv,
+        int flatten_hierarchy,
+        int visible_layers_only,
+        int renderable_only,
+        int face_sets,
+        int use_subdiv_schema,
+        int compression_type,
+        int packuv,
+        float scale)
+{
+/* We have to enable allow_threads, because we may change scene frame number
+ * during export. */
+#ifdef WITH_PYTHON
+	BPy_BEGIN_ALLOW_THREADS;
+#endif
+
+	const struct AlembicExportParams params = {
+	    .frame_start = frame_start,
+	    .frame_end = frame_end,
+
+	    .frame_step_xform = 1.0 / (double)xform_samples,
+	    .frame_step_shape = 1.0 / (double)geom_samples,
+
+	    .shutter_open = shutter_open,
+	    .shutter_close = shutter_close,
+
+	    .selected_only = selected_only,
+	    .uvs = uvs,
+	    .normals = normals,
+	    .vcolors = vcolors,
+	    .apply_subdiv = apply_subdiv,
+	    .flatten_hierarchy = flatten_hierarchy,
+	    .visible_layers_only = visible_layers_only,
+	    .renderable_only = renderable_only,
+	    .face_sets = face_sets,
+	    .use_subdiv_schema = use_subdiv_schema,
+	    .compression_type = compression_type,
+	    .packuv = packuv,
+
+	    .global_scale = scale,
+	};
+
+	ABC_export(scene, C, filepath, &params);
+
+#ifdef WITH_PYTHON
+	BPy_END_ALLOW_THREADS;
+#endif
+}
+
+#endif
+
 #ifdef WITH_COLLADA
 /* don't remove this, as COLLADA exporting cannot be done through operators in render() callback. */
 #include "../../collada/collada.h"
@@ -296,6 +376,37 @@ void RNA_api_scene(StructRNA *srna)
 
 	RNA_def_function_ui_description(func, "Export to collada file");
 #endif
+
+#ifdef WITH_ALEMBIC
+	func = RNA_def_function(srna, "alembic_export", "rna_Scene_alembic_export");
+	RNA_def_function_ui_description(func, "Export to Alembic file");
+
+	parm = RNA_def_string(func, "filepath", NULL, FILE_MAX, "File Path", "File path to write Alembic file");
+	RNA_def_property_flag(parm, PROP_REQUIRED);
+	RNA_def_property_subtype(parm, PROP_FILEPATH); /* allow non utf8 */
+
+	RNA_def_int(func, "frame_start", 1, INT_MIN, INT_MAX, "Start", "Start Frame", INT_MIN, INT_MAX);
+	RNA_def_int(func, "frame_end", 1, INT_MIN, INT_MAX, "End", "End Frame", INT_MIN, INT_MAX);
+	RNA_def_int(func, "xform_samples", 1, 1, 128, "Xform samples", "Transform samples per frame", 1, 128);
+	RNA_def_int(func, "geom_samples", 1, 1, 128, "Geom samples", "Geometry samples per frame", 1, 128);
+	RNA_def_float(func, "shutter_open", 0.0f, -1.0f, 1.0f, "Shutter open", "", -1.0f, 1.0f);
+	RNA_def_float(func, "shutter_close", 1.0f, -1.0f, 1.0f, "Shutter close", "", -1.0f, 1.0f);
+	RNA_def_boolean(func, "selected_only"	, 0, "Selected only", "Export only selected objects");
+	RNA_def_boolean(func, "uvs"			, 1, "UVs", "Export UVs");
+	RNA_def_boolean(func, "normals"		, 1, "Normals", "Export cormals");
+	RNA_def_boolean(func, "vcolors"		, 0, "Vertex colors", "Export vertex colors");
+	RNA_def_boolean(func, "apply_subdiv"	, 1, "Subsurfs as meshes", "Export subdivision surfaces as meshes");
+	RNA_def_boolean(func, "flatten"		, 0, "Flatten hierarchy", "Flatten hierarchy");
+	RNA_def_boolean(func, "visible_layers_only"	, 0, "Visible layers only", "Export only objects in visible layers");
+	RNA_def_boolean(func, "renderable_only"	, 0, "Renderable objects only", "Export only objects marked renderable in the outliner");
+	RNA_def_boolean(func, "face_sets"	, 0, "Facesets", "Export face sets");
+	RNA_def_boolean(func, "subdiv_schema", 0, "Use Alembic subdivision Schema", "Use Alembic subdivision Schema");
+	RNA_def_enum(func, "compression_type", rna_enum_abc_compression_items, 0, "Compression", "");
+	RNA_def_boolean(func, "packuv"		, 0, "Export with packed UV islands", "Export with packed UV islands");
+	RNA_def_float(func, "scale", 1.0f, 0.0001f, 1000.0f, "Scale", "Value by which to enlarge or shrink the objects with respect to the world's origin", 0.0001f, 1000.0f);
+
+	RNA_def_function_flag(func, FUNC_USE_CONTEXT);
+#endif
 }
 
 
diff --git a/source/blender/makesrna/intern/rna_space.c b/source/blender/makesrna/intern/rna_space.c
index 4818fe0cd35..1c8d4a4c818 100644
--- a/source/blender/makesrna/intern/rna_space.c
+++ b/source/blender/makesrna/intern/rna_space.c
@@ -3355,6 +3355,7 @@ static void rna_def_space_dopesheet(BlenderRNA *brna)
 		{SACTCONT_SHAPEKEY, "SHAPEKEY", ICON_SHAPEKEY_DATA, "Shape Key Editor", "Edit keyframes in active object's Shape Keys action"},
 		{SACTCONT_GPENCIL, "GPENCIL", ICON_GREASEPENCIL, "Grease Pencil", "Edit timings for all Grease Pencil sketches in file"},
 		{SACTCONT_MASK, "MASK", ICON_MOD_MASK, "Mask", "Edit timings for Mask Editor splines"},
+		{SACTCONT_CACHEFILE, "CACHEFILE", ICON_FILE, "Cache File", "Edit timings for Cache File data-blocks"},
 		{0, NULL, 0, NULL, NULL}
 	};
 		
@@ -3799,6 +3800,7 @@ static void rna_def_fileselect_params(BlenderRNA *brna)
 		{FILTER_ID_AR, "ARMATURE", ICON_ARMATURE_DATA, "Armatures", "Show/hide Armature data-blocks"},
 		{FILTER_ID_BR, "BRUSH", ICON_BRUSH_DATA, "Brushes", "Show/hide Brushes data-blocks"},
 		{FILTER_ID_CA, "CAMERA", ICON_CAMERA_DATA, "Cameras", "Show/hide Camera data-blocks"},
+		{FILTER_ID_CF, "CACHEFILE", ICON_FILE, "Cache Files", "Show/hide Cache File data-blocks"},
 		{FILTER_ID_CU, "CURVE", ICON_CURVE_DATA, "Curves", "Show/hide Curve data-blocks"},
 		{FILTER_ID_GD, "GREASE_PENCIL", ICON_GREASEPENCIL, "Grease Pencil", "Show/hide Grease pencil data-blocks"},
 		{FILTER_ID_GR, "GROUP", ICON_GROUP, "Groups", "Show/hide Group data-blocks"},
@@ -3844,7 +3846,7 @@ static void rna_def_fileselect_params(BlenderRNA *brna)
 	     "IMAGE", ICON_IMAGE_DATA, "Images & Sounds", "Show/hide images, movie clips, sounds and masks"},
 		{FILTER_ID_CA | FILTER_ID_LA | FILTER_ID_SPK | FILTER_ID_WO,
 	     "ENVIRONMENT", ICON_WORLD_DATA, "Environment", "Show/hide worlds, lamps, cameras and speakers"},
-		{FILTER_ID_BR | FILTER_ID_GD | FILTER_ID_PA | FILTER_ID_PAL | FILTER_ID_PC | FILTER_ID_TXT | FILTER_ID_VF,
+		{FILTER_ID_BR | FILTER_ID_GD | FILTER_ID_PA | FILTER_ID_PAL | FILTER_ID_PC | FILTER_ID_TXT | FILTER_ID_VF | FILTER_ID_CF,
 	     "MISC", ICON_GREASEPENCIL, "Miscellaneous", "Show/hide other data types"},
 	    {0, NULL, 0, NULL, NULL}
 	};
diff --git a/source/blender/makesrna/intern/rna_ui_api.c b/source/blender/makesrna/intern/rna_ui_api.c
index 80777f57811..a751c414d83 100644
--- a/source/blender/makesrna/intern/rna_ui_api.c
+++ b/source/blender/makesrna/intern/rna_ui_api.c
@@ -912,6 +912,11 @@ void RNA_api_ui_layout(StructRNA *srna)
 	RNA_def_function_ui_description(func, "Node Socket Icon");
 	RNA_def_function_flag(func, FUNC_USE_CONTEXT);
 	RNA_def_float_array(func, "color", 4, node_socket_color_default, 0.0f, 1.0f, "Color", "", 0.0f, 1.0f);
+
+	func = RNA_def_function(srna, "template_cache_file", "uiTemplateCacheFile");
+	RNA_def_function_ui_description(func, "Item(s). User interface for selecting cache files and their source paths");
+	RNA_def_function_flag(func, FUNC_USE_CONTEXT);
+	api_ui_item_rna_common(func);
 }
 
 #endif